Add event handler for m.room.canonical_alias

.gitignore

@@ -67,3 +67,4 @@ Makefile.in
 /src/matrix-event-room-join-rules.c
 /src/matrix-event-room-name.c
 /src/matrix-event-tag.c
+/src/matrix-event-room-canonical-alias.c

src/Makefile.am

@@ -37,6 +37,7 @@ libmatrix_glib_0_0_la_VALA_SOURCES = \
 	matrix-event-room-join-rules.vala \
 	matrix-event-room-name.vala \
 	matrix-event-tag.vala \
+	matrix-event-room-canonical-alias.vala \
 	$(NULL)
 
 AM_CPPFLAGS += \

src/matrix-event-room-canonical-alias.vala

@@ -0,0 +1,57 @@
+/*
+ * This file is part of matrix-glib-sdk
+ *
+ * matrix-glib-sdk is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation, either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * matrix-glib-sdk is distributed in the hope that it will be
+ * useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with matrix-glib-sdk. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * Class to hold a m.room.canonical_alias event
+ *
+ * This event is used to inform the room about which alias should be
+ * considered the canonical one. This could be for display purposes or
+ * as suggestion to users which alias to use to advertise the room.
+ */
+public class Matrix.Event.RoomCanonicalAlias : Matrix.Event.State {
+    public string? canonical_alias { get; set; default = null; }
+
+    protected override void
+    from_json(Json.Node json_data)
+        throws Matrix.Error
+    {
+        var content_root = json_data.get_object()
+            .get_member("content").get_object();
+        Json.Node? node;
+
+        if ((node = content_root.get_member("alias")) != null) {
+            _canonical_alias = node.get_string();
+        }
+
+        base.from_json(json_data);
+    }
+
+    protected override void
+    to_json(Json.Node json_data)
+        throws Matrix.Error
+    {
+        var content_root = json_data.get_object()
+            .get_member("content").get_object();
+
+        if (_canonical_alias != null) {
+            content_root.set_string_member("alias", _canonical_alias);
+        }
+
+        base.to_json(json_data);
+    }
+}

src/matrix-event-types.c

@@ -185,6 +185,9 @@ matrix_event_types_ctor(void)
     matrix_event_register_type("m.tag",
                                MATRIX_EVENT_TYPE_TAG,
                                NULL);
+    matrix_event_register_type("m.room.canonical_alias",
+                               MATRIX_EVENT_TYPE_ROOM_CANONICAL_ALIAS,
+                               NULL);
 }
 
 void